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Currently running this motor in a 3 kg nemesis (HK).
15x13 prop 4500mah 5s.
Very good speed and unlimited vertical.
Being careful on the throttle results in long flight time with all components returning only mildly warm.
After 6 flights very happy so far.

Thisd is my second SK 3 motor and thea are really good quality. Nicely machined and working very smooth. Goood power. Use it with a 15x8 Prop on 5S and it gives around 5KG of thrust. Recommended motor.

Fitted this motor into a SIG Fourstar with an APC style 11 X 7 prop, Zippy Flightmax 4000 mah 5S 1P 40C battery and a Ripmax Quantum 60amp ESC. Static test gave 595watts with battery at 94pcnt. Motor stopped 3minutes into first flight. Motor removed from model, shaft can be turned by hand but feels rough and smells of hot insulation. HK are asking for video evidence but I'm not going to risk my ESC by trying to run this motor again. From the lack of response from HK to my messages, after the video request, I assume they do not intend to honour the warranty. I will not be buying another SK3 as quality issues are also being reported in reviews on the Global Warehouse listing for this motor.

put on a 1450mm FMS p51B .
Good power compared to the original engine , probably over 25pcnt. Compatible with esc 65A fms (cold after) .
4s in 3300 and original propeller 4 blades, 6 minutes ... I'll put an APC 15 * 7 to save a few minutes .

I have been flying this motor with 5S 5000 mAh on Hyperion helios 63e for some 15 flights and suddenly magnets went off and motor stopped. Motor will go direct to the bin. Fortunately I could land on without problems.
Bad quality motor HobbyKing.

I use this motor in my Black Horse Models Mustang 60 size airframe. Perfect fit in cowling and weight balance. My setup is Sentilon HV 100A ESC, Turnigy Nanotech 45-90C 6S lipo and 13x8 APC (glow) prop. At full tilt, this setup draws around 50 amps. Setup is good for 6 min. WOT flying. No overheating what so ever. This motor pulls hard.. Just short of enough pulling power to shear off the wings. unlimited vertical, and level 140km/h average low pass. Absolutely the best combination Ive done on this airframe.